Stamp-lifter.



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APPLICATION FILED MAR. 10, 190B.

Patente mil 1909.

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Patented June v15, 1909.

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IINITEB STATES PATENT FFIOE.

STAMP-LIFTER.

Specification ofLetters Patent.

Patented :rune 15, 190e.

Application led March 10, 1908. Serial No. 420,147.

T 0 all whom 'it may Concern.'

Be it known that I, BENLEY F. COLEMAN, citizen of United States,residing at Confidence, in the county'of Tuolumne and State ofCalifornia., have invented new and useful Improvements in Stamp-Lifters,of which the following is a specification.

My invention relates to a device for lifting and holding up one or moreof the stamps of a crushing mill so that such stamps may be held out ofoperation at pleasure. Y

It consists in the combination of parts, and in details ofV constructionwhich will be more fully explained by reference to the accompanyingdrawings, in'which Figure 1 is a v iew in line with the cam shaft. Fig.2 is a side elevation showing two stamps. Fig. 3 shows the deviceapplied to a five stamp mill. Fig. 4 is a view showing one stamp stemand its tappet in an elevated position. Figs. 5, 6, 7 and S are enlargeddetails of the operating devices.

In ore crushing mills in which vertically rising and falling stamps areemployed, the stamp stems A are slidable in guides B upon the frame.

Tappets 2 are 'fixed to the stamp stems at suitable points so as to beengaged by cams 3 which are iiXed to the cam shaft 4 at such positionsthat they revolve close besif e the stamp stem, and in such a plane asto engage the lower surfaces of the tappets, and alternately raise thetappet, the stem and the stamp carried at the lower end of the stem, andwhen at its highest point, the cam passes beyond the tappet, the latterand the stampA will drop upon the ore which is contained within what istermed a mortar where the crushing takes place.

It is frequently necessary to place one or more of the stampstemporarily out of operation, and in order to do this either the camshaft and its tappets must be stopped, or the stamps must be raised sothat the cams will not engage the tappets.

In order to avoid the necessity of stopping a number of the stamps whereonly one or more needs attention, I have constructed the present device.

This device consists of a cam-shaped plate 5 YIiXed'upon the upper endof a sleeve 6.

The sleeve 6 is parallel with and contiguous to the stamp stem A, and insuch a position relative to the lifting cam 3 that when the cam or arm 5has been turned into operative position, it will extend into the path oftravel of the cam 3 which, engaging the arm 5, will lift it and with it,its sleeve and other connected parts. v

Above the arm 5 is a plate 7-. Both the arm 5 and the plate `7 arecomparatively thin, and after the cam has raised the arm 5 and thelparts connected therewith, the plate 7 will be interposed beneath thetappet, and thus permanently hold it at an elevation just suflicient toclear the cam 3 while the latter is being revolved. The arm 5 may bewithdrawn meanwhile so that the cam does not engage it while thel stamphas been thus hung up or supported. This condition may conltinue as longas desired, and when the stamp is to be again released, the arm 5 beingplaced in position to be engaged by the cam, will raise the tappetsufficiently to release the plato 7, and again allow the stamp to bethrown into operation. The mechanism by which these movements areeffected is as follows: 8 is a vertical cylindrical guide upon which thesleeve 6 is slidable. This guide has a pin 9 projecting from onefside,fiand this pin e11- ters a slot 10 made inY the sleeve 6 and this slot 10is curvedgat the upper end as shown in Figs. 2 and 4, s o that whenthesleeve 6 is slightly raised, the stationary pin 9 acting in thecurved slot causes the sleeve 6 to turn a little, and thus engage thearm 5 with the cam 3. This'turning is effected as follows: At'the bottomof the sleeve 6 are projecting il-shaped points 11, and fulcrumed to theguide 8 is an arm or tongue 12 which projects upwardly sufficiently toengage the projection 11. This tongue is movable by means of a handlever 13 within reach of the operator. To balance the strain upon theseparts, I prefer to employ two of the tongues 12 located upon oppositesides of the guide 8, and each engaging a similar point 11 upon thesleeve 6.

14 is a support extending transversely beneath the guide 8 which issupported thereon. Turnable upon the cylindrical portion of the support14 are arms 15, one upon each side of the line of the guide 8, andhaving grooves or channels, with upwardly extending points 16 upon eachside.

17 are arms connected with the shaft or fulerurn of the tongue 12 andturnable there with so that when the hand-lever 13 which is iiXed to thefulcrum shaft 12, is turned in either direction, the projecting points17 which engage with the lugs or projections 16, will swing the arms 15upon the support 14.

Between the lower ends ol the levers or arms 15 is fmed Van angularsupport 18 plainly shown in Figs. 5 and 6.

The guide 8 is hollow, and through this guide extends a rodA 19. Thesupporting plate 7 is fixed upon the upper end. oi' this rod, and asthis plate is just above the arm', it will be understood that when thearm 5 is engaged with the cam 3, and the sleeve 6 is lifted thereby, itwill by engagement with the plate 7, li'lt this plate and the rod 1Q inunison with its own upward movement. Wlhen these parts have reachedtheir highest point, the support 18 impelled by arm 17 will projectunder the lower end of the rod 19, and the plate 7 will thus besupported beneath the tappet, and thus prevent the latter fromdescending as long as it is in this position.

When it is desired to again release the stamp and allow it to resume itsmovements, the arm 5 will be again turned into the line ol travel of thecam 3, and when the cam has raised the arm to its highest point it willtemporarily relieve the pressure upon the plate 7, thus allowing thesupport 18 to be withdrawn by arm 17 from beneath the rod 19 whichcarries the plate 7, and the latter may hen drop to its normal position,the arm being at the same time withdrawn from the line of travel of thecam so that the latter will act upon the tappet unimpeded.

In order to provide a yielding movement ol' the parts, the lever arm 13extends bc tween collars 20 which are slidable upon a supporting bar 21,and are normally held to their inward position by springs 22. The objectol' this device is to allow the parts to yield il, when the arm isturned it lirst strikes the side of the cam 3, before passing into theline of movement ol the cam, and as soon as the cam has reached thepoint where the cam can pass over it, the springs will insure itsmovement.

In Fig. 3 I have shown a battery ol five stamp stems, and the operationoi this device is plainly apparent in .this view, as the cams are all soset upon the shaft with relation to each other as to substantiallydivide the lift ol' the various stamps, and it will be manifest that ifit were desirable to hang up all the stamps at once, some of the arms' 5might pass immediately over the cams, while others would strike the sideol the cam and be alterward thrown into proper position by the action olthe springs.

I-Iaving thus described my invention, what I claim and desire to secureby Letters Patent is- 1. The combination with the rising and fallingstems and tappets and cams or" a stamp battery, of arms, mechanism bywhich said arms may be turned into the path of travel of the cams andlift the tappets, and

supports engaging the tappets in their elevated position.

2. The combination with the rising and falling stems and tappets andcams of a stamp battery, ol arms, mechanism by which said arms may beturned into the path of travel ol the cams and lift the tappets, meansincluding a plate raised in unison with an arm to contact with a tappet,and a support engaging said plate in its elevated position.

3. The combination with the rising and falling stems, tappets and camsof a stamp battery, ot arms, mechanism by which said arms may be turnedinto the path of travel'of cams and lilt the tappets, rods slidable inunison with the upward movement of the arms, said rods each having aplate upon its upper end to contact with the bottomof a tappet in itshighest position, supports for each of the rods, and means by which saidsupports are placed beneath the lower ends of the rods to support thetappets after the arms have been moved out of contact with the cams. Y

1l. A stamp supporting device consisting of an arm, a vertical sleeveupon which said arm is carried and with which it is turnable, means forturning said arm, a shaft, contact points carried by the shaft and bythe sleeve whereby the sleeve and arm may be turned, a cam between whichand the. tappet the arm is turned, a rod. slidable within the sleeve,and a plate liXed to the upper end. of the rod, a support and meanswhereby it is moved beneath the lower end of the rod when the plate andtappet are at their highest elevation.

5. In a stamp stem support, a vertical guide contiguous to the stampstem having a projecting pin, a sleeve turnable and slidable upon theguide having a slot through which the pin projects, an arm carried byand turnable with the sleeve, a rod extending through the guide having aplate fixed to its Aupper end, a support for the rod, a tappet liftingcam into and out of line with which the arm is turnable, projectionsupon the lower end of the sleeve, a shaft, tongues car-` ried thereby toengage the projections whereby the sleeve and arm may be turned.

6. In a stamp stem and tappet supporting device, a vertical guidecontiguous to the stamp stem, a slotted sleeve turnab'le and slidableupon the guide said guide having a pin projecting into the slot, an armcarried upon tl upper end of the sleeve, projections upon the lower endolI the sleeve, a shaft, tongues carried thereby engaging theprojections to turn the sleeve and move the arm carried thereby into thepath of travel of tappet lifting cams whereby the sleeve and its arm areraised in unison with the tappet, a rod slidable witl'iin the guidehaving a plate upon its upper end adapted to engage with the tappet,said plate being lifted in unison with the upward movement of the sleeveand In testimony whereof I have hereunto set arm, a transverselytiltable lever, a support my hand in presence of two subscribingwitearred at its lower end and adapted to be nesses.

moved beneath the lower end of the rod BENLEY F. COLEMAN. when thelatter and the tappet are at the Witnesses:

highest peint, and means carried by said CHARLES A. RUFIELD,

shaft to tilt the lever. l S. H. NoURsE.

